Critical Analysis of a Bipolar Charge Transport Model Using Mathematical Tools for Solving Inverse Problems

An optimization method known as Trust Region Reflective Algorithm has been employed to optimize the parameters of a bipolar charge transport (BCT) model. This model was developed to describe the dynamic behavior of the space charge in Low-Density Polyethylene (LDPE). Results obtained by the BCT model with the optimized parameters well described the behavior of charge distribution observed in a range of electric field. Furthermore, the effects of the variation of electric fields on trapping and detrapping rates are also addressed. Moreover, the model limitations and possible improvements are discussed.